WO2017056914A1 - Misfueling prevention device - Google Patents

Misfueling prevention device Download PDF

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Publication number
WO2017056914A1
WO2017056914A1 PCT/JP2016/076557 JP2016076557W WO2017056914A1 WO 2017056914 A1 WO2017056914 A1 WO 2017056914A1 JP 2016076557 W JP2016076557 W JP 2016076557W WO 2017056914 A1 WO2017056914 A1 WO 2017056914A1
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WO
WIPO (PCT)
Prior art keywords
flap
slide
side support
end side
flaps
Prior art date
Application number
PCT/JP2016/076557
Other languages
French (fr)
Japanese (ja)
Inventor
健 廣原
大成 金
Original Assignee
八千代工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 八千代工業株式会社 filed Critical 八千代工業株式会社
Priority to JP2017543073A priority Critical patent/JP6462890B2/en
Publication of WO2017056914A1 publication Critical patent/WO2017056914A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/04—Tank inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/32—Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines

Definitions

  • the present invention relates to an erroneous oiling prevention device.
  • Patent Document 1 A conventional example of an erroneous oiling prevention device that prevents the insertion of a small-diameter oil supply pipe and permits the insertion of a large-diameter oil supply pipe is disclosed in Patent Document 1.
  • Patent Document 1 describes a technique in which a shaft member is provided in a bearing bracket portion of a housing and the shaft member is engaged with a bearing hole of a flap (shutter member). The bearing hole is formed as a long hole, and the flap is supported by the shaft member so as to be slidable and rotatable in the radial direction of the insertion passage of the oil supply pipe.
  • the present invention was created to solve such problems, and aims to reduce the malfunction of the flaps in the misfueling prevention device.
  • the present invention is an erroneous oiling prevention device that is provided in an oil supply passage and prevents the insertion of a small-diameter oil supply pipe and allows the large-diameter oil supply pipe to be inserted in the oil supply pipe insertion direction.
  • a flap having an inclined surface that is inclined and pressed against the oil supply pipe, one end-side support portion that supports the lower surface on one end side of the flap, and another end-side support portion that supports the lower surface on the other end side of the flap;
  • a curved surface portion formed around the other end side support portion, and a guide portion formed on the flap and guided by the curved surface portion, the flap being pressed by the inclined surface,
  • the conventional engagement structure for engaging the shaft member and the elongated hole is not necessary as the flap support structure. This eliminates the problem of clogging of foreign matter in the narrow slot and can reduce the malfunction of the flap.
  • the present invention further includes an urging member that urges the flap in a closing direction to rotate, and a restricting portion that positions the flap in a closed position against the urging force of the urging member.
  • the portion is provided between the one end side support portion and the other end side support portion in the flap sliding direction so as to come into contact with the upper surface side of the flap, thereby providing a guide function for sliding the flap. It is characterized by having.
  • the regulating portion by providing the regulating portion with a flap closing position positioning function and a slide movement guide function, the number of flap support elements can be reduced, and manufacturing errors between a plurality of support elements can be reduced. The influence of assembly errors can be reduced.
  • a pair of the flaps are provided so as to be double-opened with the center of the oil supply passage as a boundary, and a single-opening blocking portion that contacts the lower surface of the mating flap is formed on the lower surface of each flap.
  • the flap can be prevented from being opened with a simple structure.
  • each of the flaps includes a first slide suppression portion and a second slide suppression portion that contacts the first slide suppression portion of the counterpart flap, and one flap is more than the other flap.
  • the flap can be prevented from being closed with a simple structure.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 3 is a cross-sectional view taken along line BB in FIG.
  • (A), (b) is an external appearance perspective view of flap 2A, 2B, respectively.
  • FIG. 3 is an explanatory diagram of the operation of the first piece closing prevention mechanism, wherein (ai) to (ci) show the parts of the first piece closing prevention mechanism, and (a-ii) to (c-ii) show one opening. The part of the blocking part is shown. It is action
  • an erroneous oil prevention device 1 is provided in an oil supply passage, prevents insertion of a small-diameter oil supply pipe (for example, gasoline oil supply gun), and prevents a large-diameter oil supply pipe (for example, light oil supply gun). ).
  • the erroneous fueling prevention device 1 includes a flap 2 that slides and rotates, a bracket 3, and a housing 4.
  • flap 2 A pair of flaps 2 are provided so as to be double-opened with an axis O that is the center of the oil supply passage as a boundary.
  • the flaps 2A and 2B are substantially line-symmetric with respect to each other with the axis O therebetween, and the flap 2A will be described below, and the flap 2B will not be described because it overlaps.
  • the surface of the flap 2A facing the outside in the axial center O direction is referred to as the upper surface
  • the surface facing the inner side of the axis O in the axial direction is referred to as the lower surface.
  • the flap 2A includes a semicircular opening / closing plate part 5 extending in a direction substantially orthogonal to the axis O at the closed position, and a peripheral wall part 6 formed along the axis O from the arc peripheral edge of the opening / closing plate part 5. And a pair of support arm portions 7 spaced in parallel from the outer peripheral surface of the peripheral wall portion 6 and extending in the sliding direction.
  • the straight edge portion 5A of the opening / closing plate portion 5 is formed along the radial direction of the axis O, and the oil supply passage is blocked by substantially abutting against the straight edge portion 5A on the flap 2B side.
  • the range that is farthest from the straight edge 5 ⁇ / b> A (the range outside the sliding direction) is inclined with respect to the insertion direction (axis O direction) of the oil supply pipe and is pressed against the oil supply pipe. 8 is formed.
  • the inclined surface 8 is formed so as to be displaced upward as it goes outward in the sliding direction.
  • the opening / closing plate part 5 is formed with a bent part 5B along the direction perpendicular to the straight edge part 5A.
  • the range of the one opening / closing plate portion 5 with the bent portion 5 ⁇ / b> B as a boundary is formed as an orthogonal plane portion 5 ⁇ / b> C extending in a direction orthogonal to the axis O, and the other opening / closing plate portion 5.
  • This range is formed as a gently inclined surface portion 5D that is displaced downward as it moves away from the bent portion 5B. Since the bent portion 5B is formed up to the inclined surface 8, as shown in FIG. 5, the inclined surface 8 is also bent with the bent portion 5B as a boundary.
  • the fuel and foreign matter remaining on the upper surface of the opening and closing plate portion 5 can be effectively removed in the radially outward direction of the opening and closing plate portion 5 via the gently inclined surface portion 5D. It can flow. Foreign matter or the like flowing out from the gently inclined surface portion 5D is discharged to the outside through the dust discharge portion 22 of the bracket 3 and the dust discharge hole 24 of the housing 4.
  • a pair of one-opening blocking portions 9 that are in contact with the lower surface of the counterpart flap 2B are formed on the lower surface of the opening / closing plate portion 5 of the flap 2A.
  • the single-opening blocking unit 9 has a function of blocking one of the flaps 2A and 2B.
  • the single-opening blocking portion 9 is formed of a substantially rectangular projecting body that is integrally formed on the lower surface of the opening / closing plate portion 5.
  • a part of the single-opening blocking portion 9 is formed so as to protrude from the straight edge 5A toward the flap 2B, and when in the closed position, the portion protruding from the straight edge 5A is the opening / closing plate portion of the other flap 2B. 5 so as to be substantially in contact with the lower surface of 5.
  • a pair of one-opening blocking portions 9 is also formed on the flap 2B side at a position that does not interfere with the one-opening blocking portion 9 of the flap 2A. The operation of the single-opening prevention unit 9 will be described later.
  • the peripheral wall portion 6 is formed relatively high near the orthogonal plane portion 5C on the upper surface side of the opening / closing plate portion 5, while foreign matter or the like is removed from the dust of the bracket 3 near the gently inclined surface portion 5D. It is formed low to facilitate discharge to the discharge portion 22.
  • a first slide portion 10 projects from the outer peripheral surface of the peripheral wall portion 6 near one end and the other end of the straight edge portion 5A. The lower surface of the first slide portion 10 is supported by the one end side support portion 14 of the bracket 3 described later so as to be slidable in the slide direction.
  • Each of the pair of support arm portions 7 is formed with a guide portion 12 that is guided by a curved surface portion 16 of the bracket 3 to be described later.
  • the guide portion 12 includes a cylindrical guide pin that protrudes from the support arm portion 7 toward the bracket 3 side.
  • the axial direction of the guide pin is perpendicular to the sliding direction of the flap 2A and perpendicular to the axial center O direction, and is parallel to the rotation center direction of the flap 2A.
  • the outer side in the sliding direction than the guide portion 12 is configured as a second slide portion 13.
  • the second slide portion 13 has a rectangular shape when viewed in a cross section in the slide direction, and extends in the slide direction.
  • the lower surface of the second slide portion 13 is supported by the other end side support portion 15 of the bracket 3 described later so as to be slidable in the sliding direction. Further, when the first slide portion 10 slides to a position where it is released from the support state of the one end side support portion 14, the support arm portion 7 is in contact with a portion of the other end side support portion 15 that is inward in the sliding direction. A contact portion 25 is formed.
  • Bracket 3 As shown in FIG. 2, the bracket 3 is a short cylindrical member that supports the flaps 2 ⁇ / b> A and 2 ⁇ / b> B so that the flaps 2 ⁇ / b> A and 2 ⁇ / b> B can slide and rotate.
  • the dust discharge portion 22 is cut out in a rectangular shape. Since the support structure of the flap 2A and the support structure of the flap 2B in the bracket 3 are the same as each other, the support structure of the flap 2A will be described below, and the flap 2B will be omitted.
  • the bracket 3 supports a lower surface on one end side of the flap 2A, specifically, a pair of one end side support portions 14 supporting the lower surface of the first slide portion 10 and a lower surface on the other end side of the flap 2A. Specifically, a pair of other end side support portions 15 that support the lower surface of the second slide portion 13 and a pair of curved surface portions 16 that are formed around the other end side support portion 15 are formed.
  • the bracket 3 is also formed with a pair of restricting portions 17 that position the flap 2A in the closed position against the urging force of the torsion coil spring 19.
  • the one end side support portion 14 protrudes in a substantially rectangular shape from the inner surface side of the bracket 3.
  • a flap positioning portion 18 protrudes from the upper surface of the one end side support portion 14.
  • One end-side support portion 14 on one side of the flap positioning portion 18 supports the first slide portion 10 of the flap 2A, and the other end-side support portion 14 on the other side supports the first slide portion 10 of the flap 2B.
  • the other end side support portion 15 protrudes from the inner surface side of the bracket 3 as a substantially cylindrical pin.
  • the axial direction of the pin is a direction orthogonal to the sliding direction of the flap 2A and orthogonal to the axial center O direction. And the axial center of the said pin becomes the rotation center of flap 2A.
  • the other end side support part 15 also serves as a function of suppressing excessive deformation of the torsion coil spring 19.
  • the torsion coil spring 19 is a biasing member that constantly biases the flap 2A in the closing direction and biases the flap 2A inward in the sliding direction.
  • the torsion coil spring 19 is disposed so that the other end side support portion 15 is positioned inside the cylindrical coil portion, and thus the other end side support portion 15 suppresses excessive deformation of the coil portion. As described above, one end side of the torsion coil spring 19 is locked to the spring locking portion 11 of the flap 2 ⁇ / b> A, and the other end side is locked to the spring locking portion 20 of the bracket 3.
  • the torsion coil spring 19 covers only the distal end side of the other end side support portion 15, and the root side supports the second slide portion 13.
  • the curved surface portion 16 is formed on the inner surface side of the bracket 3 and has a curvature around the axis of the other end side support portion 15.
  • the curved surface portion 16 has a function of guiding the guide portion 12.
  • an inner curved surface portion 21 having a curvature larger than the curvature of the curved surface portion 16 is formed centering on the axis of the other end side support portion 15 so as to face the curved surface portion 16.
  • the restricting portion 17 protrudes from the inner surface side of the bracket 3 as a substantially cylindrical pin.
  • the axial center direction of the pin is parallel to the axial center direction of the other end side support portion 15.
  • the restricting portion 17 is between the one end side support portion 14 and the other end side support portion 15 in the sliding direction of the flap 2A, and comes into contact with the upper surface side of the flap 2A, specifically, the upper surface of the support arm portion 7. It is provided with the guide function of the slide movement of the flap 2A.
  • the housing 4 is a casing member of the erroneous oil supply prevention device 1 and has a bottomless cylindrical shape that is externally fitted to the bracket 3.
  • a circular insertion port 23 through which the oil supply pipe passes is formed in the center of the upper surface of the housing 4, and a rectangular dust discharge hole 24 communicating with the dust discharge portion 22 of the bracket 3 is formed in the peripheral surface.
  • “Action” 6A shows a state in which the flaps 2A and 2B are closed by the urging force of the torsion coil spring 19 toward the inner side in the sliding direction.
  • the flaps 2 ⁇ / b> A and 2 ⁇ / b> B are also subjected to a biasing force of the torsion coil spring 19 in the closing direction, but are restricted by the restricting portion 17 and maintained at a predetermined closed position.
  • the flaps 2A and 2B are in the state which cannot be rotated in an opening direction.
  • both the flaps 2A and 2B cannot be opened at the same time. This prevents erroneous lubrication of the small-diameter oil supply pipe.
  • FIG. 6B when both inclined surfaces 8 of the flaps 2A and 2B are simultaneously pressed against the biasing force of the torsion coil spring 19 by the oil supply pipe 31 having a predetermined diameter, the flaps 2A and 2B Since the part 7 is guided by the restricting part 17 and the first slide part 10 and the second slide part 13 slide on the one end side support part 14 and the other end side support part 15, respectively, the three-point support state is stabilized. In the posture, as shown in FIG.
  • the projecting dimension of the single-opening blocking portion 9A from the straight edge 5A is L1
  • the slide movement distance from the closed position of the flap 2A to the rotatable position is S1
  • the slide movement distance from the closed position of the flap 2B to the rotatable position Is S2
  • the protrusion dimension L1 is set to a dimension that satisfies the relationship of “S2 ⁇ L1 ⁇ S1 + S2”.
  • the protruding dimension L2 from the straight edge 5A of the one-opening blocking portion 9B is set to a dimension that satisfies the relationship “S1 ⁇ L2 ⁇ S1 + S2”.
  • the protrusion dimensions L1 and L2 have the same value.
  • the flaps 2 ⁇ / b> A and 2 ⁇ / b> B are slid in the radially outward direction of the oil supply passage while sliding on the one end side support portion 14 and the other end side support portion 15 when the inclined surface 8 is pressed.
  • the support structure of the flaps 2A and 2B is as follows: A conventional engagement structure for engaging the shaft member and the elongated hole is not necessary. As a result, the problem of clogging of foreign matter in the narrow elongated hole is eliminated, and the malfunction of the flaps 2A and 2B can be reduced.
  • a torsion coil spring 19 biasing member that urges the flaps 2A and 2B to rotate in the closing direction
  • a regulating portion 17 that positions the flaps 2A and 2B in the closed position against the urging force of the torsion coil spring 19.
  • the restricting portion 17 is provided between the one end side support portion 14 and the other end side support portion 15 in the sliding direction of the flaps 2A and 2B and is in contact with the upper surface side of the flaps 2A and 2B.
  • the single closing prevention mechanism includes two mechanisms, a first piece closing prevention mechanism 50 and a second piece closing prevention mechanism 60.
  • the reason for providing two single-close prevention mechanisms is mainly to distribute the applied force and to make the flaps 2A and 2B slide and rotate smoothly, so that these operations should not be hindered.
  • only one of the first piece closing prevention mechanism 50 and the second piece closing prevention mechanism 60 may be provided.
  • two first piece closing prevention mechanisms 50 or two second piece closing prevention mechanisms 60 may be provided.
  • the first piece closing prevention mechanism 50 contacts the first slide suppressing portion 51 formed on each flap 2A, 2B and the first slide suppressing portion 51 formed on each flap 2A, 2B on the other flap 2A, 2B. And a second slide suppressing portion 52 in contact therewith.
  • reference numerals 51A and 52A are attached to the first slide suppressing section and the second slide suppressing section on the flap 2A side
  • reference numerals 51B and 52B are attached to the first slide suppressing section and the second slide suppressing section on the flap 2B side. explain.
  • the first slide suppressing portion 51A and the second slide suppressing portion 52A are formed with the peripheral wall portion 6 on one end side (the side on which the orthogonal plane portion 5C is formed) of the linear edge portion 5A. It is formed between the first slide part 10.
  • 51 A of 1st slide suppression parts are substantially the same height position as the opening-and-closing plate part 5, and turn to the flap 2B side from the linear edge part 5A, and the rotation axis (other end side support part 15 (FIG. 1)) direction of flap 2A. It is formed as a convex plate portion 53A protruding so as to exhibit a substantially semicircular shape.
  • the protrusion dimension M1 (FIG.
  • an arc convex surface portion 54A centering on the rotation axis of the flap 2A (the other end side support portion 15 (FIG. 1)) has an axis O more than the convex plate portion 53A. It is formed to be wide on the radially outer side.
  • the range of the arc-shaped convex surface portion 54A (the range indicated by the mesh line in FIG. 9A) formed on the radially outer side of the axis O from the convex plate portion 53A is the first slide suppression portion 51B of the flap 2B.
  • the second slide suppressing part 52A is configured.
  • the arc length of the arc-shaped convex surface portion 54A is pulled out with the oil supply pipe 31 (FIG.
  • a recessed portion 55A is formed below the second slide suppressing portion 52A for accommodating the first slide suppressing portion 51B of the flap 2B when both the flap 2A and the flap 2B are completely closed.
  • the first slide suppressing portion 51B and the second slide suppressing portion 52B of the flap 2B are formed at positions that complement the second slide suppressing portion 52A and the first slide suppressing portion 51A of the flap 2A, and the shape itself is the flap 2A. It is based on. That is, in the flap 2B shown in FIG. 9B, the first slide suppression portion 51B and the second slide suppression portion 52B are peripheral wall portions on one end side (the side where the orthogonal plane portion 5C is formed) of the linear edge portion 5A. 6 and the first slide portion 10.
  • the first slide suppressing portion 51B is directed to the rotation axis of the flap 2B (the other end side support portion 15 (FIG. 1)) from the straight edge portion 5A toward the flap 2A side at substantially the same height position as the opening / closing plate portion 5. It is formed as a convex plate portion 53B protruding so as to exhibit a substantially semicircular shape.
  • an arc convex surface portion 54B with the other end side support portion 15 (FIG. 1) as the center of curvature is wider on the radially inner side of the axis O than the convex plate portion 53B. It is formed as follows.
  • the range of the arc-shaped convex surface portion 54B formed on the radially inner side of the axis O from the convex plate portion 53B (the range indicated by the mesh line in FIG. 9B) is the first slide suppression portion 51A of the flap 2A.
  • the second slide suppression part 52B is configured.
  • a recessed portion 55B is formed below the second slide suppressing portion 52B for accommodating the first slide suppressing portion 51A of the flap 2A when both the flap 2A and the flap 2B are completely closed.
  • “Second piece closing prevention mechanism 60” Although it is possible to provide the first piece closing prevention mechanism 50 on the other end side (the side on which the gently inclined surface portion 5D is formed) of the linear edge portion 5A, the opening / closing plate portion that flows out along the gently inclined surface portion 5D There is a possibility that the first piece closing prevention mechanism 50 may block the residual fuel and foreign matter on the top 5. Therefore, the 2nd piece closing prevention mechanism 60 is provided in the lower surface of each opening-and-closing plate part 5 of flap 2A, 2B. The second piece closing prevention mechanism 60 contacts the first slide suppressing portion 61 formed on each flap 2A, 2B and the first slide suppressing portion 61 formed on each flap 2A, 2B on the other flap 2A, 2B.
  • reference numerals 61A and 62A are attached to the first slide suppressing section and the second slide suppressing section on the flap 2A side
  • reference numerals 61B and 62B are attached to the first slide suppressing section and the second slide suppressing section on the flap 2B side. explain.
  • a rib 63A protrudes downward from the lower surface of the orthogonal plane portion 5C near the bent portion 5B.
  • An arc concave surface portion 64 ⁇ / b> A is formed at a portion of the rib 63 ⁇ / b> A facing the flap 2 ⁇ / b> B with the rotation axis of the flap 2 ⁇ / b> B (the other end side support portion 15 (FIG. 1)) as the center of curvature.
  • the arc concave surface portion 64A constitutes the first slide suppressing portion 61A. The arc length of the arc-shaped concave surface portion 64A is pulled out when the oil supply pipe 31 (FIG.
  • a concave portion 65A is formed on the upper portion of the rib 63A in the vicinity of the straight edge portion 5A to accommodate the second slide suppressing portion 62B of the flap 2B when both the flap 2A and the flap 2B are completely closed.
  • a convex portion 66A is formed on the lower surface of the gently inclined surface portion 5D near the bent portion 5B so as to protrude from the straight edge portion 5A toward the flap 2B.
  • the convex portion 66A constitutes a second slide suppression portion 62A that contacts the first slide suppression portion 61B of the flap 2B.
  • the protrusion dimension N1 (FIG. 11) of the convex portion 66A from the straight edge 5A is such that the flap 2B is not caught by the one-opening blocking portion 9A of the flap 2A when it comes into contact with the first slide suppressing portion 61B of the flap 2B. It is the dimension which can suppress the sliding of the flap 2A in the closing direction so that it can be rotated in the radial direction.
  • the first slide suppression portion 61B and the second slide suppression portion 62B of the flap 2B are formed at positions that complement the second slide suppression portion 62A and the first slide suppression portion 61A of the flap 2A, and the shape itself is the flap 2A. It is based on. That is, in the flap 2B shown in FIG. 9 (b), a rib 63B protrudes downward from the lower surface of the gently inclined surface portion 5D near the bent portion 5B, and the rib 63B is opposed to the flap 2A.
  • An arc concave surface portion 64B is formed with the rotation axis of the flap 2A (the other end side support portion 15 (FIG. 1)) as the center of curvature.
  • the arc concave surface portion 64B constitutes the first slide suppressing portion 61B.
  • a concave portion 65B is formed in the upper portion of the rib 63B in the vicinity of the straight edge portion 5A to accommodate the second slide suppressing portion 62A of the flap 2A when both the flap 2A and the flap 2B are completely closed.
  • a convex portion 66B is formed on the lower surface of the orthogonal flat surface portion 5C near the bent portion 5B so as to protrude from the straight edge portion 5A toward the flap 2A.
  • the convex portion 66B constitutes a second slide suppression portion 62B that comes into contact with the first slide suppression portion 61A of the flap 2A.
  • the problem of the single closing of the flaps 2A and 2B caused by the single opening prevention portion 9 can be avoided with a simple structure.

Abstract

This misfueling prevention device is disposed on a fueling path, thereby preventing a small-diameter fueling pipe from being inserted therethrough while allowing a large-diameter fueling pipe to be inserted therethrough. The device is equipped with: flaps (2A), (2B) which have inclined surfaces (8) inclined with respect to the insertion direction of the fueling pipe and to be pushed by the fueling pipe; one-end-side support parts (14) which support lower surfaces of the flaps (2A), (2B) at one end; other-end-side support parts (15) which support the lower surfaces of the flaps (2A), (2B) at the other end; curved surface parts (16) which are formed with the other-end-side support parts (15) as the center; and guide parts (12) which are formed on the flaps (2A), (2B) and are guided by the curved surface parts (16). When the inclined surfaces (8) are pushed, the flaps (2A), (2B) move outward in the radius direction of the fueling path while sliding against the one-end-side support parts (14) and the other-end-side support parts (15). When the supported state by the one-end-side support parts (14) is released as the flaps have slid/moved a predetermined distance, the guide parts (12) rotate in an opening direction by being guided by the curved surface parts (16).

Description

誤給油防止装置Misfueling prevention device
　本発明は、誤給油防止装置に関する。 The present invention relates to an erroneous oiling prevention device.
　小径の給油管の挿通を阻止し大径の給油管の挿通を許容する誤給油防止装置の従来例として特許文献１に記載のものが挙げられる。特許文献１には、ハウジングの軸受ブラケット部に軸部材を設け、当該軸部材をフラップ（シャッタ部材）の軸受孔に係合させる技術が記載されている。軸受孔は長孔として形成されており、フラップは軸部材に、給油管の挿通路の径方向にスライド移動可能かつ回動可能に支持されている。 A conventional example of an erroneous oiling prevention device that prevents the insertion of a small-diameter oil supply pipe and permits the insertion of a large-diameter oil supply pipe is disclosed in Patent Document 1. Patent Document 1 describes a technique in which a shaft member is provided in a bearing bracket portion of a housing and the shaft member is engaged with a bearing hole of a flap (shutter member). The bearing hole is formed as a long hole, and the flap is supported by the shaft member so as to be slidable and rotatable in the radial direction of the insertion passage of the oil supply pipe.
特許第５３８５２８８号公報Japanese Patent No. 5385288
　しかしながら、特許文献１の技術によれば、軸部材に対して狭小な長孔を係合させる構造であることから、塵埃や溜まり水の結氷等の外部からの異物が長孔に詰まり、フラップの動作不良を起こすおそれがある。 However, according to the technique of Patent Document 1, since the narrow long hole is engaged with the shaft member, foreign matters such as dust and icing water accumulated in the long hole are clogged in the long hole, and the flap There is a risk of malfunction.
　本発明はこのような課題を解決するために創作されたものであり、誤給油防止装置においてフラップの動作不良の低減を図ることを目的としている。 The present invention was created to solve such problems, and aims to reduce the malfunction of the flaps in the misfueling prevention device.
　前記課題を解決するため、本発明は、給油通路に設けられ、小径の給油管の挿通を阻止し大径の給油管の挿通を許容する誤給油防止装置であって、給油管の挿通方向に対して傾斜し給油管に押圧される傾斜面を有したフラップと、前記フラップの一端側下面を支持する一端側支持部と、前記フラップの他端側下面を支持する他端側支持部と、前記他端側支持部を中心に形成された曲面部と、前記フラップに形成され、前記曲面部にガイドされるガイド部と、を備え、前記フラップは、前記傾斜面が押圧されることにより、前記一端側支持部および前記他端側支持部に摺動しつつ給油通路の径外方向にスライド移動し、所定距離だけスライド移動して前記一端側支持部の支持状態が解かれると、前記ガイド部が前記曲面部にガイドされて開方向に回動することを特徴とする。 In order to solve the above-mentioned problem, the present invention is an erroneous oiling prevention device that is provided in an oil supply passage and prevents the insertion of a small-diameter oil supply pipe and allows the large-diameter oil supply pipe to be inserted in the oil supply pipe insertion direction. A flap having an inclined surface that is inclined and pressed against the oil supply pipe, one end-side support portion that supports the lower surface on one end side of the flap, and another end-side support portion that supports the lower surface on the other end side of the flap; A curved surface portion formed around the other end side support portion, and a guide portion formed on the flap and guided by the curved surface portion, the flap being pressed by the inclined surface, When the one end side support portion and the other end side support portion are slid in the radially outward direction of the oil supply passage, and are slid by a predetermined distance to release the support state of the one end side support portion, the guide The part is guided by the curved part and opened Characterized in that it pivots.
　本発明によれば、フラップの支持構造として、軸部材と長孔とを係合させる従来の係合構造が不要となる。これにより、狭小な長孔における異物の詰まりの問題も無くなり、フラップの動作不良を低減できる。 According to the present invention, the conventional engagement structure for engaging the shaft member and the elongated hole is not necessary as the flap support structure. This eliminates the problem of clogging of foreign matter in the narrow slot and can reduce the malfunction of the flap.
　また、本発明は、前記フラップを閉方向に回動付勢する付勢部材と、前記付勢部材の付勢力に抗して前記フラップを閉位置に位置させる規制部と、を備え、前記規制部は、フラップのスライド方向における前記一端側支持部と前記他端側支持部との間であって前記フラップの上面側に当接するように設けられることにより、前記フラップのスライド移動のガイド機能を有することを特徴とする。 The present invention further includes an urging member that urges the flap in a closing direction to rotate, and a restricting portion that positions the flap in a closed position against the urging force of the urging member. The portion is provided between the one end side support portion and the other end side support portion in the flap sliding direction so as to come into contact with the upper surface side of the flap, thereby providing a guide function for sliding the flap. It is characterized by having.
　本発明によれば、規制部にフラップの閉位置の位置決め機能とスライド移動のガイド機能とを持たせることにより、フラップの支持要素の点数を減らすことができ、複数の支持要素間の製造誤差や組み付け誤差の影響を低減できる。 According to the present invention, by providing the regulating portion with a flap closing position positioning function and a slide movement guide function, the number of flap support elements can be reduced, and manufacturing errors between a plurality of support elements can be reduced. The influence of assembly errors can be reduced.
　また、本発明は、前記フラップは、給油通路の中心を境に両開きとなるように一対設けられ、各フラップの下面には相手側のフラップの下面に当接する片開き阻止部が形成され、どちらか一方のフラップのみがスライド移動して回動可能位置に達したとき、当該フラップの開方向の回動が他方のフラップの片開き阻止部により阻止されることを特徴とする。 Further, according to the present invention, a pair of the flaps are provided so as to be double-opened with the center of the oil supply passage as a boundary, and a single-opening blocking portion that contacts the lower surface of the mating flap is formed on the lower surface of each flap. When only one of the flaps slides to reach the pivotable position, the flap is prevented from being pivoted in the opening direction by the one flap blocking portion of the other flap.
　本発明によれば、簡単な構造でフラップの片開きを阻止できる。 According to the present invention, the flap can be prevented from being opened with a simple structure.
　また、本発明では、前記各フラップは、第１スライド抑制部と、相手側のフラップの前記第１スライド抑制部に当接する第２スライド抑制部と、を備え、一方のフラップが他方のフラップよりも遅れて閉方向に回動するとき、他方のフラップの前記第１スライド抑制部と一方のフラップの前記第２スライド抑制部とが当接することにより、他方のフラップの径内方向へのスライドが抑制され、一方のフラップと他方のフラップの前記片開き阻止部との接触が阻止されることを特徴とする。 In the present invention, each of the flaps includes a first slide suppression portion and a second slide suppression portion that contacts the first slide suppression portion of the counterpart flap, and one flap is more than the other flap. When the first flap restraining portion of the other flap comes into contact with the second slide restraining portion of the one flap, the slide in the radially inward direction of the other flap is performed. It is restrained and the contact with the said one opening prevention part of one flap and the other flap is blocked | prevented, It is characterized by the above-mentioned.
　本発明によれば、簡単な構造でフラップの片閉じを阻止できる。 According to the present invention, the flap can be prevented from being closed with a simple structure.
　本発明によれば、異物の詰まり等に起因するフラップの動作不良を低減できる。 According to the present invention, it is possible to reduce the malfunction of the flap due to clogging of foreign matters.
本発明の誤給油防止装置の側面説明図である。It is side surface explanatory drawing of the erroneous oil supply prevention apparatus of this invention. 本発明の誤給油防止装置の分解斜視図である。It is a disassembled perspective view of the erroneous oil supply prevention apparatus of this invention. ブラケットにフラップを組み付けた状態の斜視図である。It is a perspective view of the state which attached the flap to the bracket. 図１におけるＡ－Ａ断面図である。FIG. 2 is a cross-sectional view taken along the line AA in FIG. 図１におけるＢ－Ｂ断面図である。FIG. 3 is a cross-sectional view taken along line BB in FIG. 誤給油防止装置の側面作用図である。It is a side action figure of a mistake oiling prevention device. 片開き阻止部の作用説明図である。It is action | operation explanatory drawing of a single opening prevention part. 片開き阻止部に起因するフラップの片閉じ状態を示す説明図である。It is explanatory drawing which shows the one-closed state of the flap resulting from a one-opening prevention part. （ａ），（ｂ）はそれぞれフラップ２Ａ，２Ｂの外観斜視図である。(A), (b) is an external appearance perspective view of flap 2A, 2B, respectively. 第１片閉じ阻止機構の作用説明図であり、（ａ－ｉ）～（ｃ－ｉ）は第１片閉じ阻止機構の部位を示し、（ａ－ｉｉ）～（ｃ－ｉｉ）は片開き阻止部の部位を示す。FIG. 3 is an explanatory diagram of the operation of the first piece closing prevention mechanism, wherein (ai) to (ci) show the parts of the first piece closing prevention mechanism, and (a-ii) to (c-ii) show one opening. The part of the blocking part is shown. 第２片閉じ阻止機構の作用説明図である。It is action | operation explanatory drawing of a 2nd piece closing prevention mechanism.
　図１～図３において、本発明の誤給油防止装置１は、給油通路に設けられ、小径の給油管（例えばガソリンの給油ガン）の挿通を阻止し大径の給油管（例えば軽油の給油ガン）の挿通を許容する装置である。誤給油防止装置１は、スライドおよび回動するフラップ２と、ブラケット３と、ハウジング４とを備えて構成されている。 1 to 3, an erroneous oil prevention device 1 according to the present invention is provided in an oil supply passage, prevents insertion of a small-diameter oil supply pipe (for example, gasoline oil supply gun), and prevents a large-diameter oil supply pipe (for example, light oil supply gun). ). The erroneous fueling prevention device 1 includes a flap 2 that slides and rotates, a bracket 3, and a housing 4.
　「フラップ２」
　フラップ２は、給油通路の中心である軸心Ｏを境に両開きとなるように一対設けられている。フラップ２Ａ，２Ｂは互いに軸心Ｏを挟んで、概ね線対称形状を呈しており、以下ではフラップ２Ａについて説明し、フラップ２Ｂについては重複のため説明は省略する。また、フラップ２Ａの軸心Ｏ方向外側に臨む面を上面、軸心Ｏ方向内側に臨む面を下面というものとする。フラップ２Ａは、閉位置において軸心Ｏと略直交する方向に延在する半円状の開閉板部５と、開閉板部５の円弧周縁部から軸心Ｏに沿って形成される周壁部６と、周壁部６の外周面から互いに平行に間隔を空け、スライド方向に延設された一対の支持アーム部７と、を有した形状からなる。 "Flap 2"
A pair of flaps 2 are provided so as to be double-opened with an axis O that is the center of the oil supply passage as a boundary. The flaps 2A and 2B are substantially line-symmetric with respect to each other with the axis O therebetween, and the flap 2A will be described below, and the flap 2B will not be described because it overlaps. Further, the surface of the flap 2A facing the outside in the axial center O direction is referred to as the upper surface, and the surface facing the inner side of the axis O in the axial direction is referred to as the lower surface. The flap 2A includes a semicircular opening / closing plate part 5 extending in a direction substantially orthogonal to the axis O at the closed position, and a peripheral wall part 6 formed along the axis O from the arc peripheral edge of the opening / closing plate part 5. And a pair of support arm portions 7 spaced in parallel from the outer peripheral surface of the peripheral wall portion 6 and extending in the sliding direction.
　開閉板部５の直線縁部５Ａは、軸心Ｏの径方向に沿って形成されており、フラップ２Ｂ側の直線縁部５Ａと互いに略突き合うことで給油通路が遮断される。開閉板部５のうちで直線縁部５Ａから最も離れた範囲（スライド方向外側の範囲）には、給油管の挿通方向（軸心Ｏ方向）に対して傾斜し給油管に押圧される傾斜面８が形成されている。傾斜面８は、スライド方向外側に向かうにしたがい、上方に変位するように形成されている。傾斜面８の下面側には、後記する捩りコイルばね１９の一端側を係止するためのばね係止部１１（図２ではフラップ２Ｂのばね係止部１１を示す）が形成されている。 The straight edge portion 5A of the opening / closing plate portion 5 is formed along the radial direction of the axis O, and the oil supply passage is blocked by substantially abutting against the straight edge portion 5A on the flap 2B side. In the opening / closing plate part 5, the range that is farthest from the straight edge 5 </ b> A (the range outside the sliding direction) is inclined with respect to the insertion direction (axis O direction) of the oil supply pipe and is pressed against the oil supply pipe. 8 is formed. The inclined surface 8 is formed so as to be displaced upward as it goes outward in the sliding direction. On the lower surface side of the inclined surface 8, there is formed a spring locking portion 11 (showing the spring locking portion 11 of the flap 2B in FIG. 2) for locking one end side of a torsion coil spring 19 described later.
　開閉板部５には、直線縁部５Ａとの直交径方向に沿う屈曲部５Ｂが形成されている。図４にも示すように、屈曲部５Ｂを境とした一方の開閉板部５の範囲は、軸心Ｏと直交する方向に延在する直交平面部５Ｃとして形成され、他方の開閉板部５の範囲は、屈曲部５Ｂから離れるにしたがい下方に変位する緩傾斜面部５Ｄとして形成されている。なお、屈曲部５Ｂは傾斜面８まで形成されているので、図５に示すように、傾斜面８も屈曲部５Ｂを境として屈曲形成されている。軸心Ｏ方向内側に変位する緩傾斜面部５Ｄを形成することで、開閉板部５の上面に残留した燃料や異物を緩傾斜面部５Ｄを介して開閉板部５の径外方向に効果的に流すことができる。緩傾斜面部５Ｄから流出した異物等はブラケット３のダスト排出部２２およびハウジング４のダスト排出孔２４を通って外部に排出される。 The opening / closing plate part 5 is formed with a bent part 5B along the direction perpendicular to the straight edge part 5A. As shown in FIG. 4, the range of the one opening / closing plate portion 5 with the bent portion 5 </ b> B as a boundary is formed as an orthogonal plane portion 5 </ b> C extending in a direction orthogonal to the axis O, and the other opening / closing plate portion 5. This range is formed as a gently inclined surface portion 5D that is displaced downward as it moves away from the bent portion 5B. Since the bent portion 5B is formed up to the inclined surface 8, as shown in FIG. 5, the inclined surface 8 is also bent with the bent portion 5B as a boundary. By forming the gently inclined surface portion 5D that is displaced inward in the axial center O direction, the fuel and foreign matter remaining on the upper surface of the opening and closing plate portion 5 can be effectively removed in the radially outward direction of the opening and closing plate portion 5 via the gently inclined surface portion 5D. It can flow. Foreign matter or the like flowing out from the gently inclined surface portion 5D is discharged to the outside through the dust discharge portion 22 of the bracket 3 and the dust discharge hole 24 of the housing 4.
　図２に示すように、フラップ２Ａの開閉板部５の下面には、相手側のフラップ２Ｂの下面に当接する片開き阻止部９が一対形成されている。片開き阻止部９は、フラップ２Ａ，２Ｂのどちらか一方の片開きを阻止する機能を有する。片開き阻止部９は、開閉板部５の下面に一体に形成された略方形の突状体からなる。片開き阻止部９の一部は直線縁部５Ａからフラップ２Ｂ側に突出するように形成されており、閉位置のとき、直線縁部５Ａから突出した部分が相手側のフラップ２Ｂの開閉板部５の下面に略接するように位置する。フラップ２Ｂ側にも、フラップ２Ａの片開き阻止部９と干渉しない位置に片開き阻止部９が一対形成されている。片開き阻止部９の作用については後述する。 As shown in FIG. 2, a pair of one-opening blocking portions 9 that are in contact with the lower surface of the counterpart flap 2B are formed on the lower surface of the opening / closing plate portion 5 of the flap 2A. The single-opening blocking unit 9 has a function of blocking one of the flaps 2A and 2B. The single-opening blocking portion 9 is formed of a substantially rectangular projecting body that is integrally formed on the lower surface of the opening / closing plate portion 5. A part of the single-opening blocking portion 9 is formed so as to protrude from the straight edge 5A toward the flap 2B, and when in the closed position, the portion protruding from the straight edge 5A is the opening / closing plate portion of the other flap 2B. 5 so as to be substantially in contact with the lower surface of 5. A pair of one-opening blocking portions 9 is also formed on the flap 2B side at a position that does not interfere with the one-opening blocking portion 9 of the flap 2A. The operation of the single-opening prevention unit 9 will be described later.
　図２に示すように、周壁部６は、開閉板部５の上面側において、直交平面部５Ｃ寄りでは比較的高く形成されている一方、緩傾斜面部５Ｄ寄りでは、異物等をブラケット３のダスト排出部２２に排出しやすくするために低く形成されている。直線縁部５Ａの一端寄りおよび他端寄りの周壁部６の外周面には第１スライド部１０が突設されている。第１スライド部１０の下面は、後述するブラケット３の一端側支持部１４にスライド方向に摺動可能に支持される。 As shown in FIG. 2, the peripheral wall portion 6 is formed relatively high near the orthogonal plane portion 5C on the upper surface side of the opening / closing plate portion 5, while foreign matter or the like is removed from the dust of the bracket 3 near the gently inclined surface portion 5D. It is formed low to facilitate discharge to the discharge portion 22. A first slide portion 10 projects from the outer peripheral surface of the peripheral wall portion 6 near one end and the other end of the straight edge portion 5A. The lower surface of the first slide portion 10 is supported by the one end side support portion 14 of the bracket 3 described later so as to be slidable in the slide direction.
　一対の支持アーム部７にはそれぞれ、後述するブラケット３の曲面部１６にガイドされるガイド部１２が形成されている。ガイド部１２は、支持アーム部７からブラケット３側に向けて突設された円柱状のガイドピンからなる。当該ガイドピンの軸心方向は、フラップ２Ａのスライド方向と直交し、かつ軸心Ｏ方向と直交する方向であり、フラップ２Ａの回動中心方向と平行である。支持アーム部７のうちでガイド部１２よりもスライド方向外側は、第２スライド部１３として構成される。第２スライド部１３は、スライド方向断面視して矩形状を呈しており、スライド方向に延設されている。第２スライド部１３の下面は、後述するブラケット３の他端側支持部１５にスライド方向に摺動可能に支持される。また、支持アーム部７には、第１スライド部１０が一端側支持部１４の支持状態から解かれる位置までスライドしたときに、他端側支持部１５におけるスライド方向内側の部位に略当接する当接部２５が形成されている。 Each of the pair of support arm portions 7 is formed with a guide portion 12 that is guided by a curved surface portion 16 of the bracket 3 to be described later. The guide portion 12 includes a cylindrical guide pin that protrudes from the support arm portion 7 toward the bracket 3 side. The axial direction of the guide pin is perpendicular to the sliding direction of the flap 2A and perpendicular to the axial center O direction, and is parallel to the rotation center direction of the flap 2A. Of the support arm portion 7, the outer side in the sliding direction than the guide portion 12 is configured as a second slide portion 13. The second slide portion 13 has a rectangular shape when viewed in a cross section in the slide direction, and extends in the slide direction. The lower surface of the second slide portion 13 is supported by the other end side support portion 15 of the bracket 3 described later so as to be slidable in the sliding direction. Further, when the first slide portion 10 slides to a position where it is released from the support state of the one end side support portion 14, the support arm portion 7 is in contact with a portion of the other end side support portion 15 that is inward in the sliding direction. A contact portion 25 is formed.
　「ブラケット３」
　図２に示すように、ブラケット３は、フラップ２Ａ，２Ｂをスライド可能かつ回動可能に支持する短筒形状の部材であり、周面の一部には、フラップ２上の異物を排出するためのダスト排出部２２が矩形状に切り欠き形成されている。ブラケット３におけるフラップ２Ａの支持構造とフラップ２Ｂの支持構造は互いに同じであるので、以下ではフラップ２Ａの支持構造を説明し、フラップ２Ｂについては省略する。ブラケット３には、フラップ２Ａの一端側下面を支持する、具体的には前記第１スライド部１０の下面を支持する一対の一端側支持部１４と、フラップ２Ａの他端側下面を支持する、具体的には前記第２スライド部１３の下面を支持する一対の他端側支持部１５と、他端側支持部１５を中心に形成された一対の曲面部１６と、が形成されている。また、ブラケット３には、捩りコイルばね１９の付勢力に抗してフラップ２Ａを閉位置に位置させる一対の規制部１７が形成されている。 "Bracket 3"
As shown in FIG. 2, the bracket 3 is a short cylindrical member that supports the flaps 2 </ b> A and 2 </ b> B so that the flaps 2 </ b> A and 2 </ b> B can slide and rotate. The dust discharge portion 22 is cut out in a rectangular shape. Since the support structure of the flap 2A and the support structure of the flap 2B in the bracket 3 are the same as each other, the support structure of the flap 2A will be described below, and the flap 2B will be omitted. The bracket 3 supports a lower surface on one end side of the flap 2A, specifically, a pair of one end side support portions 14 supporting the lower surface of the first slide portion 10 and a lower surface on the other end side of the flap 2A. Specifically, a pair of other end side support portions 15 that support the lower surface of the second slide portion 13 and a pair of curved surface portions 16 that are formed around the other end side support portion 15 are formed. The bracket 3 is also formed with a pair of restricting portions 17 that position the flap 2A in the closed position against the urging force of the torsion coil spring 19.
　一端側支持部１４は、ブラケット３の内面側から略方形体状に突設されている。一端側支持部１４の上面にはフラップ位置決め部１８が突設されている。フラップ位置決め部１８を挟んで一方側の一端側支持部１４はフラップ２Ａの第１スライド部１０を支持し、他方側の一端側支持部１４はフラップ２Ｂの第１スライド部１０を支持する。フラップ２Ａ，２Ｂの各第１スライド部１０がフラップ位置決め部１８の側面に当接することで、スライド方向に関するフラップ２Ａ，２Ｂの閉位置が位置決めされる。 The one end side support portion 14 protrudes in a substantially rectangular shape from the inner surface side of the bracket 3. A flap positioning portion 18 protrudes from the upper surface of the one end side support portion 14. One end-side support portion 14 on one side of the flap positioning portion 18 supports the first slide portion 10 of the flap 2A, and the other end-side support portion 14 on the other side supports the first slide portion 10 of the flap 2B. When the first slide portions 10 of the flaps 2A and 2B are in contact with the side surfaces of the flap positioning portion 18, the closed positions of the flaps 2A and 2B in the slide direction are positioned.
　他端側支持部１５は、ブラケット３の内面側から略円柱状のピンとして突設されている。当該ピンの軸心方向は、フラップ２Ａのスライド方向と直交し、かつ軸心Ｏ方向と直交する方向である。そして、当該ピンの軸心がフラップ２Ａの回動中心となる。他端側支持部１５は、捩りコイルばね１９の過剰変形の抑制機能も兼ねている。捩りコイルばね１９は、フラップ２Ａを常時、閉方向に回動付勢およびスライド方向内側に付勢する付勢部材である。捩りコイルばね１９は、円筒状のコイル部の内部に他端側支持部１５が位置するように配置されることで、コイル部の過剰変形が他端側支持部１５によって抑制される。捩りコイルばね１９の一端側は前記したようにフラップ２Ａのばね係止部１１に係止され、他端側はブラケット３のばね係止部２０に係止される。なお、捩りコイルばね１９が被さるのは他端側支持部１５の先端側のみであり、根元側が第２スライド部１３を支持するようになっている。 The other end side support portion 15 protrudes from the inner surface side of the bracket 3 as a substantially cylindrical pin. The axial direction of the pin is a direction orthogonal to the sliding direction of the flap 2A and orthogonal to the axial center O direction. And the axial center of the said pin becomes the rotation center of flap 2A. The other end side support part 15 also serves as a function of suppressing excessive deformation of the torsion coil spring 19. The torsion coil spring 19 is a biasing member that constantly biases the flap 2A in the closing direction and biases the flap 2A inward in the sliding direction. The torsion coil spring 19 is disposed so that the other end side support portion 15 is positioned inside the cylindrical coil portion, and thus the other end side support portion 15 suppresses excessive deformation of the coil portion. As described above, one end side of the torsion coil spring 19 is locked to the spring locking portion 11 of the flap 2 </ b> A, and the other end side is locked to the spring locking portion 20 of the bracket 3. The torsion coil spring 19 covers only the distal end side of the other end side support portion 15, and the root side supports the second slide portion 13.
　曲面部１６は、ブラケット３の内面側に形成されており、他端側支持部１５の軸心を中心とした曲率を有している。曲面部１６はガイド部１２をガイドする機能を担う。本実施形態では、曲面部１６に対向して、他端側支持部１５の軸心を中心とし曲面部１６の曲率よりも大きい曲率の内側曲面部２１が形成されている。フラップ２Ａは、他端側支持部１５を中心に回動する際に、ガイド部１２の外側が曲面部１６にガイドされるとともにガイド部１２の内側が内側曲面部２１にガイドされる。 The curved surface portion 16 is formed on the inner surface side of the bracket 3 and has a curvature around the axis of the other end side support portion 15. The curved surface portion 16 has a function of guiding the guide portion 12. In the present embodiment, an inner curved surface portion 21 having a curvature larger than the curvature of the curved surface portion 16 is formed centering on the axis of the other end side support portion 15 so as to face the curved surface portion 16. When the flap 2 </ b> A rotates about the other end side support portion 15, the outside of the guide portion 12 is guided by the curved surface portion 16 and the inside of the guide portion 12 is guided by the inside curved surface portion 21.
　規制部１７は、ブラケット３の内面側から略円柱状のピンとして突設されている。当該ピンの軸心方向は、他端側支持部１５の軸心方向と平行である。規制部１７は、フラップ２Ａのスライド方向における一端側支持部１４と他端側支持部１５との間であって、フラップ２Ａの上面側、具体的には支持アーム部７の上面に当接するように設けられていることにより、フラップ２Ａのスライド移動のガイド機能も兼ね備えている。 The restricting portion 17 protrudes from the inner surface side of the bracket 3 as a substantially cylindrical pin. The axial center direction of the pin is parallel to the axial center direction of the other end side support portion 15. The restricting portion 17 is between the one end side support portion 14 and the other end side support portion 15 in the sliding direction of the flap 2A, and comes into contact with the upper surface side of the flap 2A, specifically, the upper surface of the support arm portion 7. It is provided with the guide function of the slide movement of the flap 2A.
　「ハウジング４」
　ハウジング４は、誤給油防止装置１の筺体部材であり、ブラケット３に外嵌する無底円筒形状を呈している。ハウジング４の上面中央には給油管を通す円形の挿通口２３が開口形成され、周面にはブラケット３のダスト排出部２２と連通する矩形のダスト排出孔２４が開口形成されている。 "Housing 4"
The housing 4 is a casing member of the erroneous oil supply prevention device 1 and has a bottomless cylindrical shape that is externally fitted to the bracket 3. A circular insertion port 23 through which the oil supply pipe passes is formed in the center of the upper surface of the housing 4, and a rectangular dust discharge hole 24 communicating with the dust discharge portion 22 of the bracket 3 is formed in the peripheral surface.
　「作用」
　図６において、（ａ）は、フラップ２Ａ，２Ｂが捩りコイルばね１９のスライド方向内側への付勢力により閉じた状態を示している。フラップ２Ａ，２Ｂには捩りコイルばね１９の閉方向への回動付勢力も作用しているが、規制部１７に規制されて所定の閉位置に維持されている。そして、第１スライド部１０の下方に一端側支持部１４が位置しているので、傾斜面８が押されない限りフラップ２Ａ，２Ｂは開方向に回動不可能の状態にある。 "Action"
6A shows a state in which the flaps 2A and 2B are closed by the urging force of the torsion coil spring 19 toward the inner side in the sliding direction. The flaps 2 </ b> A and 2 </ b> B are also subjected to a biasing force of the torsion coil spring 19 in the closing direction, but are restricted by the restricting portion 17 and maintained at a predetermined closed position. And since the one end side support part 14 is located under the 1st slide part 10, unless the inclined surface 8 is pushed, the flaps 2A and 2B are in the state which cannot be rotated in an opening direction.
　フラップ２Ａ，２Ｂの両傾斜面８に同時に届かない小径の給油管ではフラップ２Ａ，２Ｂの両方を同時に開くことはできず、これにより小径の給油管の誤給油が防止される。図６（ｂ）に示すように所定径の給油管３１によりフラップ２Ａ，２Ｂの両傾斜面８が捩りコイルばね１９の付勢力に抗して同時に押されると、フラップ２Ａ，２Ｂは、支持アーム部７が規制部１７にガイドされ、第１スライド部１０、第２スライド部１３がそれぞれ一端側支持部１４、他端側支持部１５上を摺動することで、３点支持状態の安定した姿勢で図６（ｂ）に示すように径外方向にスライド移動する。 ¡With a small-diameter oil supply pipe that does not reach both the inclined surfaces 8 of the flaps 2A and 2B at the same time, both the flaps 2A and 2B cannot be opened at the same time. This prevents erroneous lubrication of the small-diameter oil supply pipe. As shown in FIG. 6B, when both inclined surfaces 8 of the flaps 2A and 2B are simultaneously pressed against the biasing force of the torsion coil spring 19 by the oil supply pipe 31 having a predetermined diameter, the flaps 2A and 2B Since the part 7 is guided by the restricting part 17 and the first slide part 10 and the second slide part 13 slide on the one end side support part 14 and the other end side support part 15, respectively, the three-point support state is stabilized. In the posture, as shown in FIG.
　フラップ２Ａ，２Ｂが所定距離だけスライドすると、第１スライド部１０において一端側支持部１４の支持状態が解かれる。このとき、フラップ２Ａ，２Ｂのガイド部１２は曲面部１６の上方に位置している。これにより、開閉板部５が給油管３１に押されると、フラップ２Ａ，２Ｂは、ガイド部１２の外側が曲面部１６にガイドされ、本実施形態ではガイド部１２の内側も内側曲面部２１（図２参照）にガイドされつつ、図６（ｃ）に示すように他端側支持部１５を中心に開方向に回動し、給油管３１が挿通される。なお、内側曲面部２１が形成されていない場合でも、捩りコイルばね１９がガイド部１２を曲面部１６に押し付けるように付勢することにより、また当接部２５が他端側支持部１５に当接することで、回動の際のフラップ２Ａ，２Ｂのがたつきが阻止される。 When the flaps 2 </ b> A and 2 </ b> B slide by a predetermined distance, the support state of the one end side support portion 14 is released in the first slide portion 10. At this time, the guide portions 12 of the flaps 2 </ b> A and 2 </ b> B are located above the curved surface portion 16. Thereby, when the opening / closing plate part 5 is pushed by the oil supply pipe 31, the flaps 2A and 2B are guided by the curved surface part 16 on the outer side of the guide part 12, and in this embodiment, the inner side of the guide part 12 is also the inner curved surface part 21 ( While being guided by FIG. 2), as shown in FIG. 6C, it rotates in the opening direction around the other end side support portion 15, and the oil supply pipe 31 is inserted. Even when the inner curved surface portion 21 is not formed, the torsion coil spring 19 urges the guide portion 12 against the curved surface portion 16 so that the contact portion 25 contacts the other end side support portion 15. By touching, rattling of the flaps 2A and 2B during rotation is prevented.
　給油管３１が抜かれると、捩りコイルばね１９の付勢力により、フラップ２Ａ，２Ｂは閉方向に回動したうえで、径内方向にスライド移動して図６（ａ）の閉位置状態に戻る。次いで図７を参照して片開き阻止部９の作用を説明する。なお、フラップ２Ａ側の片開き阻止部に符号９Ａを付し、フラップ２Ｂ側の片開き阻止部に符号９Ｂを付す。片開き阻止部９Ａの直線縁部５Ａからの突出寸法をＬ１、フラップ２Ａの閉位置から回動可能位置までのスライド移動距離をＳ１、フラップ２Ｂの閉位置から回動可能位置までのスライド移動距離をＳ２とすると、突出寸法Ｌ１は、「Ｓ２＜Ｌ１＜Ｓ１＋Ｓ２」の関係を満たす寸法に設定されている。同様に、片開き阻止部９Ｂの直線縁部５Ａからの突出寸法Ｌ２は、「Ｓ１＜Ｌ２＜Ｓ１＋Ｓ２」の関係を満たす寸法に設定されている。本実施形態ではスライド移動距離Ｓ１，Ｓ２は互いに同じ値であるので、突出寸法Ｌ１，Ｌ２は互いに同じ値である。 When the oil supply pipe 31 is pulled out, the flaps 2A and 2B are rotated in the closing direction by the biasing force of the torsion coil spring 19, and then slid in the radial direction to return to the closed position in FIG. 6 (a). . Next, the operation of the single-opening prevention unit 9 will be described with reference to FIG. In addition, the code | symbol 9A is attached | subjected to the flap 2A side single opening prevention part, and the code | symbol 9B is attached | subjected to the flap 2B side single opening prevention part. The projecting dimension of the single-opening blocking portion 9A from the straight edge 5A is L1, the slide movement distance from the closed position of the flap 2A to the rotatable position is S1, and the slide movement distance from the closed position of the flap 2B to the rotatable position Is S2, the protrusion dimension L1 is set to a dimension that satisfies the relationship of “S2 <L1 <S1 + S2”. Similarly, the protruding dimension L2 from the straight edge 5A of the one-opening blocking portion 9B is set to a dimension that satisfies the relationship “S1 <L2 <S1 + S2”. In the present embodiment, since the slide movement distances S1 and S2 have the same value, the protrusion dimensions L1 and L2 have the same value.
　以上により、図７（ａ）に示す閉位置の状態から一方のフラップ２Ｂのみがスライド移動して回動可能位置に達しても、「Ｓ２＜Ｌ１」の関係により、図７（ｂ）に示すようにフラップ２Ｂの下方にはフラップ２Ａの片開き阻止部９Ａが位置しているので、フラップ２Ｂの片開きが阻止される。同様に、フラップ２Ａのみがスライド移動した場合についても、片開き阻止部９Ｂによってフラップ２Ａの片開きが阻止される。そして、図７（ｃ）に示すように、フラップ２Ａ，２Ｂの両方がスライド移動してそれぞれ回動可能位置に達した場合には、「Ｌ１＜Ｓ１＋Ｓ２」，「Ｌ２＜Ｓ１＋Ｓ２」の関係により、相手方の片開き阻止部９から解かれるので、フラップ２Ａ，２Ｂの両開きが可能となる。 Thus, even if only one flap 2B slides from the closed position shown in FIG. 7A to reach the rotatable position, the relationship shown in FIG. 7B is obtained due to the relationship “S2 <L1”. Thus, since the single-opening blocking portion 9A of the flap 2A is positioned below the flap 2B, the single-opening of the flap 2B is blocked. Similarly, when only the flap 2A is slid, the flap 2A is prevented from being opened by the single-opening blocking portion 9B. And as shown in FIG.7 (c), when both flap 2A, 2B slide-moves and each reached the position which can be rotated, by the relationship of "L1 <S1 + S2", "L2 <S1 + S2", Since it is unwound from the one-side opening prevention part 9 of the other party, both opening of flap 2A, 2B is attained.
　以上のように、フラップ２Ａ，２Ｂは、傾斜面８が押圧されることにより、一端側支持部１４および他端側支持部１５に摺動しつつ給油通路の径外方向にスライド移動し、所定距離だけスライド移動して一端側支持部１４の支持状態が解かれると、ガイド部１２が曲面部１６にガイドされて開方向に回動する構成とすれば、フラップ２Ａ，２Ｂの支持構造として、軸部材と長孔とを係合させる従来の係合構造が不要となる。これにより、狭小な長孔における異物の詰まりの問題も無くなり、フラップ２Ａ，２Ｂの動作不良を低減できる。 As described above, the flaps 2 </ b> A and 2 </ b> B are slid in the radially outward direction of the oil supply passage while sliding on the one end side support portion 14 and the other end side support portion 15 when the inclined surface 8 is pressed. When the guide portion 12 is guided by the curved surface portion 16 and rotated in the opening direction when the support state of the one end side support portion 14 is released by sliding the distance, the support structure of the flaps 2A and 2B is as follows: A conventional engagement structure for engaging the shaft member and the elongated hole is not necessary. As a result, the problem of clogging of foreign matter in the narrow elongated hole is eliminated, and the malfunction of the flaps 2A and 2B can be reduced.
　また、フラップ２Ａ，２Ｂを閉方向に回動付勢する捩りコイルばね１９（付勢部材）と、捩りコイルばね１９の付勢力に抗してフラップ２Ａ，２Ｂを閉位置に位置させる規制部１７と、を備え、規制部１７は、フラップ２Ａ，２Ｂのスライド方向における一端側支持部１４と他端側支持部１５との間であってフラップ２Ａ，２Ｂの上面側に当接するように設けられることにより、フラップ２Ａ，２Ｂのスライド移動のガイド機能を兼ね備える構成とすれば、フラップ２Ａ，２Ｂの支持要素の点数を減らすことができ、その分、複数の支持要素間の製造誤差や組み付け誤差の影響を低減できる。なお、付勢部材は、捩りコイルばね１９に限定されず、板ばね等を用いてもよい。 Further, a torsion coil spring 19 (biasing member) that urges the flaps 2A and 2B to rotate in the closing direction, and a regulating portion 17 that positions the flaps 2A and 2B in the closed position against the urging force of the torsion coil spring 19. The restricting portion 17 is provided between the one end side support portion 14 and the other end side support portion 15 in the sliding direction of the flaps 2A and 2B and is in contact with the upper surface side of the flaps 2A and 2B. Thus, if the structure has a guide function for sliding movement of the flaps 2A and 2B, the number of support elements of the flaps 2A and 2B can be reduced, and accordingly, manufacturing errors and assembly errors between the plurality of support elements can be reduced. The impact can be reduced. The urging member is not limited to the torsion coil spring 19, and a leaf spring or the like may be used.
　次に片開き阻止部９に起因するフラップ２Ａ，２Ｂの片閉じの問題について図８を参照して説明する。例えば給油管３１が軸心Ｏに対して傾いて抜かれたとき、給油管３１と非接触状態となったフラップ２Ａのみが先に閉じ、フラップ２Ｂが遅れて閉方向に回動する場合が考えられる。このとき、フラップ２Ｂの上縁がフラップ２Ａの片開き阻止部９Ａに引っ掛かってそれ以上のフラップ２Ｂの回動が阻害され、フラップ２Ａのみが閉じた片閉じ状態になるおそれがある。 Next, the problem of the single closing of the flaps 2A and 2B caused by the single opening prevention unit 9 will be described with reference to FIG. For example, when the oil supply pipe 31 is pulled out with an inclination with respect to the axis O, only the flap 2A that is in a non-contact state with the oil supply pipe 31 is closed first, and the flap 2B is delayed and rotates in the closing direction. . At this time, there is a possibility that the upper edge of the flap 2B is caught by the one-opening blocking portion 9A of the flap 2A, and the further rotation of the flap 2B is obstructed, so that only the flap 2A is closed.
　しかし、この問題は以下に示す片閉じ阻止機構を備えることで解決できる。図９～図１１を参照してこの片閉じ阻止機構を説明する。片閉じ阻止機構は、一方のフラップが他方のフラップよりも遅れて閉方向に回動するとき、他方のフラップの径内方向へのスライドを抑制することで、一方のフラップと他方のフラップの片開き阻止部９との接触を阻止する。図９では、片閉じ阻止機構として、第１片閉じ阻止機構５０と、第２片閉じ阻止機構６０との２つの機構で構成している。片閉じ阻止機構を２つ設けた理由は、主に力のかかり具合を分散させてフラップ２Ａ，２Ｂのスライド動作、回動動作をスムーズに行わせるためであり、もしこれらの動作に支障がなければ、第１片閉じ阻止機構５０、第２片閉じ阻止機構６０の内のどちらか一方のみを設ける構成にしても構わない。場合により、第１片閉じ阻止機構５０を２つ設ける、或いは第２片閉じ阻止機構６０を２つ設ける構成にしてもよい。 However, this problem can be solved by providing the following single-close prevention mechanism. The single closing prevention mechanism will be described with reference to FIGS. When one flap rotates in the closing direction later than the other flap, the one-close prevention mechanism suppresses the sliding of the other flap in the radially inward direction, so that one flap and the other flap piece Contact with the opening prevention part 9 is prevented. In FIG. 9, the single closing prevention mechanism includes two mechanisms, a first piece closing prevention mechanism 50 and a second piece closing prevention mechanism 60. The reason for providing two single-close prevention mechanisms is mainly to distribute the applied force and to make the flaps 2A and 2B slide and rotate smoothly, so that these operations should not be hindered. For example, only one of the first piece closing prevention mechanism 50 and the second piece closing prevention mechanism 60 may be provided. Depending on the case, two first piece closing prevention mechanisms 50 or two second piece closing prevention mechanisms 60 may be provided.
　「第１片閉じ阻止機構５０」
　先ず、第１片閉じ阻止機構５０について説明する。第１片閉じ阻止機構５０は、各フラップ２Ａ，２Ｂに形成された第１スライド抑制部５１と、各フラップ２Ａ，２Ｂに形成され相手側のフラップ２Ａ，２Ｂの第１スライド抑制部５１に当接する第２スライド抑制部５２と、を備えている。以下、フラップ２Ａ側の第１スライド抑制部、第２スライド抑制部に符号５１Ａ，５２Ａを付し、フラップ２Ｂ側の第１スライド抑制部、第２スライド抑制部に符号５１Ｂ、５２Ｂを付して説明する。 "First piece closing prevention mechanism 50"
First, the first piece closing prevention mechanism 50 will be described. The first piece closing prevention mechanism 50 contacts the first slide suppressing portion 51 formed on each flap 2A, 2B and the first slide suppressing portion 51 formed on each flap 2A, 2B on the other flap 2A, 2B. And a second slide suppressing portion 52 in contact therewith. Hereinafter, reference numerals 51A and 52A are attached to the first slide suppressing section and the second slide suppressing section on the flap 2A side, and reference numerals 51B and 52B are attached to the first slide suppressing section and the second slide suppressing section on the flap 2B side. explain.
　図９（ａ）に示すフラップ２Ａにおいて、第１スライド抑制部５１Ａおよび第２スライド抑制部５２Ａは、直線縁部５Ａの一端側（直交平面部５Ｃが形成されている側）における周壁部６と第１スライド部１０との間に形成されている。第１スライド抑制部５１Ａは、開閉板部５と略同じ高さ位置において、直線縁部５Ａからフラップ２Ｂ側に向け、フラップ２Ａの回動軸（他端側支持部１５（図１））方向視して略半円形状を呈するように突設された凸状板部５３Ａとして形成されている。凸状板部５３Ａの直線縁部５Ａからの突出寸法Ｍ１（図１０）は、フラップ２Ｂの第２スライド抑制部５２Ｂと当接したとき、フラップ２Ｂがフラップ２Ａの片開き阻止部９Ａに引っ掛かることなく閉方向に回動できるように、フラップ２Ａの径内方向のスライドを抑制し得る寸法である。 In the flap 2A shown in FIG. 9 (a), the first slide suppressing portion 51A and the second slide suppressing portion 52A are formed with the peripheral wall portion 6 on one end side (the side on which the orthogonal plane portion 5C is formed) of the linear edge portion 5A. It is formed between the first slide part 10. 51 A of 1st slide suppression parts are substantially the same height position as the opening-and-closing plate part 5, and turn to the flap 2B side from the linear edge part 5A, and the rotation axis (other end side support part 15 (FIG. 1)) direction of flap 2A. It is formed as a convex plate portion 53A protruding so as to exhibit a substantially semicircular shape. The protrusion dimension M1 (FIG. 10) from the straight edge portion 5A of the convex plate portion 53A is such that when the flap 2B comes into contact with the second slide suppression portion 52B of the flap 2B, the flap 2B is caught by the one-opening prevention portion 9A of the flap 2A. It is the dimension which can suppress the slide of the radial direction of 2 A of flaps so that it can rotate in a closing direction instead.
　凸状板部５３Ａの上方には、フラップ２Ａの回動軸（他端側支持部１５（図１））を曲率中心とした円弧凸面部５４Ａが、凸状板部５３Ａよりも軸心Ｏの径外方向側に幅広となるように形成されている。この凸状板部５３Ａよりも軸心Ｏの径外方向側に形成された円弧凸面部５４Ａの範囲（図９（ａ）に網線で示す範囲）が、フラップ２Ｂの第１スライド抑制部５１Ｂと当接する範囲、つまり第２スライド抑制部５２Ａを構成する。円弧凸面部５４Ａの円弧長さは、給油管３１（図８）が最も傾いた状態で抜かれ、そのときに、フラップ２Ａが想定し得る最大の回動角度で開いた状態になっても、フラップ２Ｂの第１スライド抑制部５１Ｂと当接する長さに設定されている。第２スライド抑制部５２Ａの下方には、フラップ２Ａおよびフラップ２Ｂが共に完全に閉じたときに、フラップ２Ｂの第１スライド抑制部５１Ｂを収容するための凹部５５Ａが形成されている。 Above the convex plate portion 53A, an arc convex surface portion 54A centering on the rotation axis of the flap 2A (the other end side support portion 15 (FIG. 1)) has an axis O more than the convex plate portion 53A. It is formed to be wide on the radially outer side. The range of the arc-shaped convex surface portion 54A (the range indicated by the mesh line in FIG. 9A) formed on the radially outer side of the axis O from the convex plate portion 53A is the first slide suppression portion 51B of the flap 2B. The second slide suppressing part 52A is configured. The arc length of the arc-shaped convex surface portion 54A is pulled out with the oil supply pipe 31 (FIG. 8) tilted most, and even if the flap 2A opens at the maximum rotation angle that can be assumed at that time, the flap The length is set so as to contact the 2B first slide suppressing portion 51B. A recessed portion 55A is formed below the second slide suppressing portion 52A for accommodating the first slide suppressing portion 51B of the flap 2B when both the flap 2A and the flap 2B are completely closed.
　フラップ２Ｂの第１スライド抑制部５１Ｂ、第２スライド抑制部５２Ｂは、フラップ２Ａの第２スライド抑制部５２Ａ、第１スライド抑制部５１Ａと補完し合う位置に形成されており、形状自体はフラップ２Ａのものに準じている。すなわち、図９（ｂ）に示すフラップ２Ｂにおいて、第１スライド抑制部５１Ｂおよび第２スライド抑制部５２Ｂは、直線縁部５Ａの一端側（直交平面部５Ｃが形成されている側）における周壁部６と第１スライド部１０との間に形成されている。第１スライド抑制部５１Ｂは、開閉板部５と略同じ高さ位置において、直線縁部５Ａからフラップ２Ａ側に向け、フラップ２Ｂの回動軸（他端側支持部１５（図１））方向視して略半円形状を呈するように突設された凸状板部５３Ｂとして形成されている。 The first slide suppressing portion 51B and the second slide suppressing portion 52B of the flap 2B are formed at positions that complement the second slide suppressing portion 52A and the first slide suppressing portion 51A of the flap 2A, and the shape itself is the flap 2A. It is based on. That is, in the flap 2B shown in FIG. 9B, the first slide suppression portion 51B and the second slide suppression portion 52B are peripheral wall portions on one end side (the side where the orthogonal plane portion 5C is formed) of the linear edge portion 5A. 6 and the first slide portion 10. The first slide suppressing portion 51B is directed to the rotation axis of the flap 2B (the other end side support portion 15 (FIG. 1)) from the straight edge portion 5A toward the flap 2A side at substantially the same height position as the opening / closing plate portion 5. It is formed as a convex plate portion 53B protruding so as to exhibit a substantially semicircular shape.
　凸状板部５３Ｂの上方には、他端側支持部１５（図１）を曲率中心とした円弧凸面部５４Ｂが、凸状板部５３Ｂよりも軸心Ｏの径内方向側に幅広となるように形成されている。この凸状板部５３Ｂよりも軸心Ｏの径内方向側に形成された円弧凸面部５４Ｂの範囲（図９（ｂ）に網線で示す範囲）が、フラップ２Ａの第１スライド抑制部５１Ａと当接する範囲、つまり第２スライド抑制部５２Ｂを構成する。第２スライド抑制部５２Ｂの下方には、フラップ２Ａおよびフラップ２Ｂが共に完全に閉じたときに、フラップ２Ａの第１スライド抑制部５１Ａを収容するための凹部５５Ｂが形成されている。 Above the convex plate portion 53B, an arc convex surface portion 54B with the other end side support portion 15 (FIG. 1) as the center of curvature is wider on the radially inner side of the axis O than the convex plate portion 53B. It is formed as follows. The range of the arc-shaped convex surface portion 54B formed on the radially inner side of the axis O from the convex plate portion 53B (the range indicated by the mesh line in FIG. 9B) is the first slide suppression portion 51A of the flap 2A. The second slide suppression part 52B is configured. A recessed portion 55B is formed below the second slide suppressing portion 52B for accommodating the first slide suppressing portion 51A of the flap 2A when both the flap 2A and the flap 2B are completely closed.
　「第２片閉じ阻止機構６０」
　第１片閉じ阻止機構５０を直線縁部５Ａの他端側（緩傾斜面部５Ｄが形成されている側）に設けることも可能であるが、そうすると、緩傾斜面部５Ｄを伝って流れ出る開閉板部５上の残留燃料や異物を第１片閉じ阻止機構５０が遮るおそれがある。そのため、第２片閉じ阻止機構６０はフラップ２Ａ，２Ｂの各開閉板部５の下面に設けられている。第２片閉じ阻止機構６０は、各フラップ２Ａ，２Ｂに形成された第１スライド抑制部６１と、各フラップ２Ａ，２Ｂに形成され相手側のフラップ２Ａ，２Ｂの第１スライド抑制部６１に当接する第２スライド抑制部６２と、を備えている。以下、フラップ２Ａ側の第１スライド抑制部、第２スライド抑制部に符号６１Ａ，６２Ａを付し、フラップ２Ｂ側の第１スライド抑制部、第２スライド抑制部に符号６１Ｂ、６２Ｂを付して説明する。 "Second piece closing prevention mechanism 60"
Although it is possible to provide the first piece closing prevention mechanism 50 on the other end side (the side on which the gently inclined surface portion 5D is formed) of the linear edge portion 5A, the opening / closing plate portion that flows out along the gently inclined surface portion 5D There is a possibility that the first piece closing prevention mechanism 50 may block the residual fuel and foreign matter on the top 5. Therefore, the 2nd piece closing prevention mechanism 60 is provided in the lower surface of each opening-and-closing plate part 5 of flap 2A, 2B. The second piece closing prevention mechanism 60 contacts the first slide suppressing portion 61 formed on each flap 2A, 2B and the first slide suppressing portion 61 formed on each flap 2A, 2B on the other flap 2A, 2B. And a second slide restraining portion 62 in contact therewith. Hereinafter, reference numerals 61A and 62A are attached to the first slide suppressing section and the second slide suppressing section on the flap 2A side, and reference numerals 61B and 62B are attached to the first slide suppressing section and the second slide suppressing section on the flap 2B side. explain.
　図９（ａ）に示すフラップ２Ａにおいて、屈曲部５Ｂ寄りの直交平面部５Ｃの下面には、リブ６３Ａが下方に向けて突設されている。リブ６３Ａのフラップ２Ｂとの対向部には、フラップ２Ｂの回動軸（他端側支持部１５（図１））を曲率中心とした円弧凹面部６４Ａが形成されている。この円弧凹面部６４Ａは、第１スライド抑制部６１Ａを構成する。円弧凹面部６４Ａの円弧長さは、給油管３１（図８）が最も傾いた状態で抜かれ、そのときに、フラップ２Ｂが想定し得る最大の回動角度で開いた状態になっても、フラップ２Ｂの第２スライド抑制部６２Ｂと当接する長さに設定されている。直線縁部５Ａ近傍のリブ６３Ａの上部には、フラップ２Ａおよびフラップ２Ｂが共に完全に閉じたときに、フラップ２Ｂの第２スライド抑制部６２Ｂを収容するための凹部６５Ａが形成されている。 In the flap 2A shown in FIG. 9 (a), a rib 63A protrudes downward from the lower surface of the orthogonal plane portion 5C near the bent portion 5B. An arc concave surface portion 64 </ b> A is formed at a portion of the rib 63 </ b> A facing the flap 2 </ b> B with the rotation axis of the flap 2 </ b> B (the other end side support portion 15 (FIG. 1)) as the center of curvature. The arc concave surface portion 64A constitutes the first slide suppressing portion 61A. The arc length of the arc-shaped concave surface portion 64A is pulled out when the oil supply pipe 31 (FIG. 8) is tilted to the maximum, and even when the flap 2B is opened at the maximum rotation angle that can be assumed, The length is set so as to be in contact with the 2B second slide suppressing portion 62B. A concave portion 65A is formed on the upper portion of the rib 63A in the vicinity of the straight edge portion 5A to accommodate the second slide suppressing portion 62B of the flap 2B when both the flap 2A and the flap 2B are completely closed.
　屈曲部５Ｂ寄りの緩傾斜面部５Ｄの下面には、直線縁部５Ａからフラップ２Ｂ側に突き出るように凸状部６６Ａが形成されている。この凸状部６６Ａは、フラップ２Ｂの第１スライド抑制部６１Ｂと当接する第２スライド抑制部６２Ａを構成する。凸状部６６Ａの直線縁部５Ａからの突出寸法Ｎ１（図１１）は、フラップ２Ｂの第１スライド抑制部６１Ｂと当接したとき、フラップ２Ｂがフラップ２Ａの片開き阻止部９Ａに引っ掛かることなく径内方向に回動できるように、フラップ２Ａの閉方向のスライドを抑制し得る寸法である。 A convex portion 66A is formed on the lower surface of the gently inclined surface portion 5D near the bent portion 5B so as to protrude from the straight edge portion 5A toward the flap 2B. The convex portion 66A constitutes a second slide suppression portion 62A that contacts the first slide suppression portion 61B of the flap 2B. The protrusion dimension N1 (FIG. 11) of the convex portion 66A from the straight edge 5A is such that the flap 2B is not caught by the one-opening blocking portion 9A of the flap 2A when it comes into contact with the first slide suppressing portion 61B of the flap 2B. It is the dimension which can suppress the sliding of the flap 2A in the closing direction so that it can be rotated in the radial direction.
　フラップ２Ｂの第１スライド抑制部６１Ｂ、第２スライド抑制部６２Ｂは、フラップ２Ａの第２スライド抑制部６２Ａ、第１スライド抑制部６１Ａと補完し合う位置に形成されており、形状自体はフラップ２Ａのものに準じている。すなわち、図９（ｂ）に示すフラップ２Ｂにおいて、屈曲部５Ｂ寄りの緩傾斜面部５Ｄの下面にはリブ６３Ｂが下方に向けて突設されており、このリブ６３Ｂのフラップ２Ａとの対向部に、フラップ２Ａの回動軸（他端側支持部１５（図１））を曲率中心とした円弧凹面部６４Ｂが形成されている。この円弧凹面部６４Ｂが、第１スライド抑制部６１Ｂを構成する。直線縁部５Ａ近傍のリブ６３Ｂの上部には、フラップ２Ａおよびフラップ２Ｂが共に完全に閉じたときに、フラップ２Ａの第２スライド抑制部６２Ａを収容するための凹部６５Ｂが形成されている。 The first slide suppression portion 61B and the second slide suppression portion 62B of the flap 2B are formed at positions that complement the second slide suppression portion 62A and the first slide suppression portion 61A of the flap 2A, and the shape itself is the flap 2A. It is based on. That is, in the flap 2B shown in FIG. 9 (b), a rib 63B protrudes downward from the lower surface of the gently inclined surface portion 5D near the bent portion 5B, and the rib 63B is opposed to the flap 2A. An arc concave surface portion 64B is formed with the rotation axis of the flap 2A (the other end side support portion 15 (FIG. 1)) as the center of curvature. The arc concave surface portion 64B constitutes the first slide suppressing portion 61B. A concave portion 65B is formed in the upper portion of the rib 63B in the vicinity of the straight edge portion 5A to accommodate the second slide suppressing portion 62A of the flap 2A when both the flap 2A and the flap 2B are completely closed.
　屈曲部５Ｂ寄りの直交平面部５Ｃの下面には、直線縁部５Ａからフラップ２Ａ側に突き出るように凸状部６６Ｂが形成されている。この凸状部６６Ｂが、フラップ２Ａの第１スライド抑制部６１Ａと当接する第２スライド抑制部６２Ｂを構成する。 A convex portion 66B is formed on the lower surface of the orthogonal flat surface portion 5C near the bent portion 5B so as to protrude from the straight edge portion 5A toward the flap 2A. The convex portion 66B constitutes a second slide suppression portion 62B that comes into contact with the first slide suppression portion 61A of the flap 2A.
　「作用」
　図１０を参照して第１片閉じ阻止機構５０の作用を説明する。給油管３１が軸心Ｏに対して傾いて抜かれ、一方のフラップ２Ｂが他方のフラップ２Ａよりも遅れて閉方向に回動する場合、図１０（ａ－ｉ）に示すように、フラップ２Ａの凸状板部５３Ａ（第１スライド抑制部５１Ａ）とフラップ２Ｂの円弧凸面部５４Ｂ（第２スライド抑制部５２Ｂ）とが当接する。これにより、フラップ２Ａは、捩りコイルばね１９（図１）のスライド方向内側への付勢力に抗して、フラップ２Ｂの円弧凸面部５４Ｂにスライド方向外側に押されることで、径内方向のスライドが抑制される。そして、図１０（ｂ－ｉ）に示すように、フラップ２Ｂが閉方向に回動すると、図１０（ｂ－ｉｉ）に示すように、フラップ２Ｂはフラップ２Ａの片開き阻止部９Ａに引っ掛かることなく回動可能となる。図１０（ｃ－ｉ），（ｃ－ｉｉ）に示すように、フラップ２Ｂが回動し終えると、フラップ２Ａの凸状板部５３Ａがフラップ２Ｂの凹部５５Ｂに収容されることでフラップ２Ａおよびフラップ２Ｂが共に閉じた状態となる。
　フラップ２Ａがフラップ２Ｂよりも遅れて閉方向に回動する場合も同様であるので、その説明は省略する。 "Action"
The operation of the first piece closing prevention mechanism 50 will be described with reference to FIG. When the oil supply pipe 31 is pulled out with an inclination with respect to the axis O and one flap 2B rotates in the closing direction later than the other flap 2A, as shown in FIG. 10 (ai), the flap 2A The convex plate portion 53A (first slide suppression portion 51A) contacts the arc convex surface portion 54B (second slide suppression portion 52B) of the flap 2B. Accordingly, the flap 2A slides radially inward by being pushed outward in the sliding direction by the arcuate convex surface portion 54B of the flap 2B against the urging force of the torsion coil spring 19 (FIG. 1) inward in the sliding direction. Is suppressed. Then, as shown in FIG. 10 (b-i), when the flap 2B rotates in the closing direction, as shown in FIG. 10 (b-ii), the flap 2B is caught by the one-opening blocking portion 9A of the flap 2A. It becomes possible to turn without. As shown in FIGS. 10 (c-i) and (c-ii), when the flap 2B has finished rotating, the convex plate portion 53A of the flap 2A is accommodated in the concave portion 55B of the flap 2B, so that the flap 2A and Both flaps 2B are closed.
Since the same applies to the case where the flap 2A rotates in the closing direction later than the flap 2B, the description thereof is omitted.
　図１１を参照して第２片閉じ阻止機構６０の作用を説明する。給油管３１が軸心Ｏに対して傾いて抜かれ、一方のフラップ２Ｂが他方のフラップ２Ａよりも遅れて閉方向に回動する場合、図１１（ａ）に示すように、フラップ２Ａの円弧凹面部６４Ａ（第１スライド抑制部６１Ａ）とフラップ２Ｂの凸状部６６Ｂ（第２スライド抑制部６２Ｂ）とが当接する。これにより、フラップ２Ａは、捩りコイルばね１９（図１）のスライド方向内側への付勢力に抗して、フラップ２Ｂの凸状部６６Ｂにスライド方向外側に押されることで、径内方向のスライドが抑制され、フラップ２Ｂがフラップ２Ａの片開き阻止部９Ａに引っ掛かることなく閉方向に回動する。そして、図１１（ｃ）に示すように、フラップ２Ｂが回動し終えると、フラップ２Ｂの凸状部６６Ｂがフラップ２Ａの凹部６５Ａに収容されることでフラップ２Ａおよびフラップ２Ｂが共に閉じる。
　フラップ２Ａがフラップ２Ｂよりも遅れて閉方向に回動する場合も同様であるので、その説明は省略する。 The operation of the second piece closing prevention mechanism 60 will be described with reference to FIG. When the oil supply pipe 31 is pulled out with an inclination with respect to the axis O and one flap 2B rotates in the closing direction later than the other flap 2A, as shown in FIG. 11A, the arc concave surface of the flap 2A The portion 64A (first slide suppression portion 61A) contacts the convex portion 66B (second slide suppression portion 62B) of the flap 2B. Thus, the flap 2A slides radially inward by being pushed outward in the sliding direction by the convex portion 66B of the flap 2B against the urging force of the torsion coil spring 19 (FIG. 1) inward in the sliding direction. Is suppressed, and the flap 2B rotates in the closing direction without being caught by the one-opening blocking portion 9A of the flap 2A. Then, as shown in FIG. 11C, when the flap 2B has finished rotating, the convex portion 66B of the flap 2B is accommodated in the concave portion 65A of the flap 2A, so that both the flap 2A and the flap 2B are closed.
Since the same applies to the case where the flap 2A rotates in the closing direction later than the flap 2B, the description thereof is omitted.
　以上のような片閉じ阻止機構を設ければ、片開き阻止部９に起因するフラップ２Ａ，２Ｂの片閉じの問題を簡単な構造で回避できる。 If the above-described single closing prevention mechanism is provided, the problem of the single closing of the flaps 2A and 2B caused by the single opening prevention portion 9 can be avoided with a simple structure.
　１　　　誤給油防止装置
　２　　　フラップ
　３　　　ブラケット
　４　　　ハウジング
　８　　　傾斜面
　９　　　片開き阻止部
１０　　　第１スライド部
１２　　　ガイド部
１３　　　第２スライド部
１４　　　一端側支持部
１５　　　他端側支持部
１６　　　曲面部
１７　　　規制部
１９　　　捩りコイルばね（付勢部材）
３１　　　給油管
５０　　　第１片閉じ阻止機構
５１　　　第１スライド抑制部
５２　　　第２スライド抑制部
６０　　　第２片閉じ阻止機構
６１　　　第１スライド抑制部
６２　　　第２スライド抑制部 DESCRIPTION OF SYMBOLS 1 Misfueling prevention apparatus 2 Flap 3 Bracket 4 Housing 8 Inclined surface 9 Single opening prevention part 10 1st slide part 12 Guide part 13 2nd slide part 14 One end side support part 15 The other end side support part 16 Curved surface part 17 Restriction part 19 Torsion coil spring (biasing member)
31 Oil supply pipe 50 1st piece closing prevention mechanism 51 1st slide suppression part 52 2nd slide prevention part 60 2nd piece closing prevention mechanism 61 1st slide suppression part 62 2nd slide suppression part

Claims (4)

  1. 　給油通路に設けられ、小径の給油管の挿通を阻止し大径の給油管の挿通を許容する誤給油防止装置であって、
    　給油管の挿通方向に対して傾斜し給油管に押圧される傾斜面を有したフラップと、
    　前記フラップの一端側下面を支持する一端側支持部と、
    　前記フラップの他端側下面を支持する他端側支持部と、
    　前記他端側支持部を中心に形成された曲面部と、
    　前記フラップに形成され、前記曲面部にガイドされるガイド部と、
    　を備え、
    　前記フラップは、前記傾斜面が押圧されることにより、前記一端側支持部および前記他端側支持部に摺動しつつ給油通路の径外方向にスライド移動し、所定距離だけスライド移動して前記一端側支持部の支持状態が解かれると、前記ガイド部が前記曲面部にガイドされて開方向に回動することを特徴とする誤給油防止装置。     An erroneous oiling prevention device provided in the oiling passage, which prevents insertion of a small diameter oil supply pipe and allows insertion of a large diameter oil supply pipe;
    A flap having an inclined surface that is inclined with respect to the insertion direction of the oil supply pipe and pressed against the oil supply pipe;
    One end-side support part for supporting the one end-side lower surface of the flap;
    The other end side support portion for supporting the lower surface of the other end side of the flap;
    A curved surface portion formed around the other end side support portion;
    A guide part formed on the flap and guided by the curved surface part;
    With
    When the inclined surface is pressed, the flap slides outward in the radial direction of the oil supply passage while sliding on the one end side support portion and the other end side support portion, and slides and moves by a predetermined distance. When the support state of the one end side support part is released, the guide part is guided by the curved surface part and rotates in the opening direction.
  2. 　前記フラップを閉方向に回動付勢する付勢部材と、
    　前記付勢部材の付勢力に抗して前記フラップを閉位置に位置させる規制部と、
    　を備え、
    　前記規制部は、フラップのスライド方向における前記一端側支持部と前記他端側支持部との間であって前記フラップの上面側に当接するように設けられることにより、前記フラップのスライド移動のガイド機能を有することを特徴とする請求項１に記載の誤給油防止装置。     A biasing member that biases the flap in a closing direction;
    A restricting portion that positions the flap in a closed position against the biasing force of the biasing member;
    With
    The restricting portion is provided between the one end side support portion and the other end side support portion in the slide direction of the flap and is in contact with the upper surface side of the flap, thereby guiding the slide movement of the flap. It has a function, The erroneous oil supply prevention apparatus of Claim 1 characterized by the above-mentioned.
  3. 　前記フラップは、給油通路の中心を境に両開きとなるように一対設けられ、
    　各フラップの下面には相手側のフラップの下面に当接する片開き阻止部が形成され、
    　どちらか一方のフラップのみがスライド移動して回動可能位置に達したとき、当該フラップの開方向の回動が他方のフラップの片開き阻止部により阻止されることを特徴とする請求項１または請求項２に記載の誤給油防止装置。     A pair of the flaps are provided so as to be double-opened with the center of the oil supply passage as a boundary,
    On the lower surface of each flap is formed a single-opening blocking portion that contacts the lower surface of the other flap,
    2. When only one of the flaps slides and reaches a pivotable position, the rotation of the flap in the opening direction is prevented by the one-opening blocking portion of the other flap. The erroneous oiling prevention device according to claim 2.
  4. 　前記各フラップは、第１スライド抑制部と、相手側のフラップの前記第１スライド抑制部に当接する第２スライド抑制部と、を備え、
    　一方のフラップが他方のフラップよりも遅れて閉方向に回動するとき、
    　他方のフラップの前記第１スライド抑制部と一方のフラップの前記第２スライド抑制部とが当接することにより、他方のフラップの径内方向へのスライドが抑制され、一方のフラップと他方のフラップの前記片開き阻止部との接触が阻止されることを特徴とする請求項３に記載の誤給油防止装置。     Each of the flaps includes a first slide suppression unit, and a second slide suppression unit that contacts the first slide suppression unit of the counterpart flap,
    When one flap rotates in the closing direction later than the other flap,
    The first slide restraining portion of the other flap and the second slide restraining portion of the one flap are in contact with each other, so that the sliding of the other flap in the radial direction is restrained, and the one flap and the other flap The erroneous oiling prevention device according to claim 3, wherein contact with the one-opening blocking portion is blocked.
PCT/JP2016/076557 2015-09-29 2016-09-09 Misfueling prevention device WO2017056914A1 (en)

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WO2017221585A1 (en) * 2016-06-20 2017-12-28 八千代工業株式会社 Erroneous refueling prevention device

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JP2007261492A (en) * 2006-03-29 2007-10-11 Toyoda Gosei Co Ltd Oil feeder for fuel tank
JP2011213235A (en) * 2010-03-31 2011-10-27 Asteer Co Ltd Mistaken oil supply preventive device of oil supply port
JP5385288B2 (en) * 2008-08-25 2014-01-08 株式会社ニフコ Misfueling prevention device

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US5730194A (en) * 1996-03-21 1998-03-24 Stant Manufacturing Inc. Capless filler neck closure system
JP2007261492A (en) * 2006-03-29 2007-10-11 Toyoda Gosei Co Ltd Oil feeder for fuel tank
JP5385288B2 (en) * 2008-08-25 2014-01-08 株式会社ニフコ Misfueling prevention device
JP2011213235A (en) * 2010-03-31 2011-10-27 Asteer Co Ltd Mistaken oil supply preventive device of oil supply port

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017221585A1 (en) * 2016-06-20 2017-12-28 八千代工業株式会社 Erroneous refueling prevention device
JPWO2017221585A1 (en) * 2016-06-20 2019-01-17 八千代工業株式会社 Misfueling prevention device
US10597283B2 (en) 2016-06-20 2020-03-24 Yachiyo Industry Co., Ltd. Erroneous refueling prevention device

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